JP2000127089A - Cutter for cutting test piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously and accurately cut plural rectangular test pieces from a multi-purpose test piece manufactured by injection molding of resin. SOLUTION: This cutter for cutting a test piece comprises a test piece placing table 10 for positioning an injection molded test piece 1 and placing the same, and a cutter head 20 for cutting desired test pieces from the placed injection molded test piece 1. The test piece placing table 10 includes a placing surface 12 where a positioning hole 13 for inserting a sprue and receiving is formed, and a sprue is inserted and received in the hole 13 to place the injection molded test piece and a positioning guide 14 projected over the placing surface, to which the side egdge of a multi-purpose test piece 5 is pressed to be positioned. The cutter head 20 includes a cutting blade 22 which is disposed opposite to the placing surface 20 and pressed to the placing surface 12 to cut desired test pieces from the injection molded test piece 1 placed on the surface 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter for cutting a multipurpose test piece from a sheet material, which is used for performing various tests on material properties of a resin such as a plastic.

[0002]

2. Description of the Related Art A characteristic test (for example, a tensile test, a bending test, a compression test, an impact test, etc.) of a resin material such as a plastic is performed according to JIS-K-7139, ISO-3167.
The test is performed using a test piece called a multipurpose test piece. The multipurpose test piece is a test piece made of a so-called dumbbell-shaped resin sheet having a wide grip portion at both ends and a narrow parallel portion at the center. For a multipurpose test piece, for example, a tensile test is performed using a dumbbell-shaped test piece as it is, and a grip portion at both ends is gripped, and a bending test and an impact test are performed for a predetermined length from a central parallel portion of the dumbbell-shaped test piece. The test is performed using a rectangular test piece that has been cut out only. The dumbbell-shaped multipurpose test piece is formed by injection molding of a resin, and the rectangular test piece is formed by cutting the central parallel portion of the multipurpose test piece each time.

[0003]

The bending test,
When cutting a dumbbell-shaped multipurpose test piece for impact test etc. to create a rectangular test piece, it is necessary to cut out exactly the specified length from the central parallel part of the multipurpose test piece. It is cut one by one from the test piece,
There is a problem that it takes time and effort to perform cutting, and it is difficult to perform accurate cutting. In order to perform accurate cutting, it is necessary to accurately position and place a dumbbell-shaped multipurpose test piece on a cutting device, and then to cut the central parallel portion with accurate dimensions. There is a problem that the configuration for accurate positioning of the cutter is easily complicated, and the cutting cutter device is easily complicated.

The present invention has been made in view of such a problem.
An object of the present invention is to provide a cutter device for cutting a plurality of rectangular test pieces simultaneously and accurately from a multipurpose test piece prepared by injection molding of a resin, and having a simple configuration. I do.

[0005]

In order to achieve the above object, a cutter apparatus for cutting a test piece according to the present invention is manufactured by injection molding of a resin material, and is connected to a plurality of runners extending through a runner extending from a sprue. An injection molded test piece integrally having a multipurpose test piece is used as it is, and a test piece having a desired shape (for example, a rectangular test piece) is cut from the injection molded test piece. By using the injection molded test piece as it is, the sprue and the runner can be used for positioning, and a plurality of multipurpose test pieces connected via the sprue and the runner can be collectively positioned. . For this reason, the configuration of the positioning device can be simplified, and a plurality of multi-purpose test pieces can be cut at a time to form a plurality of rectangular test pieces by one cutting.

The cutter apparatus for cutting a test piece according to the present invention is, specifically, a test piece mounting table for positioning and mounting an injection molded test piece, and an injection molded test piece mounted on the test piece mounting table. (Multipurpose test piece) and a cutter head for cutting out a desired test piece. Here, the test piece mounting table is formed with a positioning hole for inserting and receiving a sprue, a mounting surface on which the sprue is inserted and received in the positioning hole, and on which the injection molded test piece is mounted, and which protrudes from the mounting surface. And a positioning guide formed to abut the side edge of the multipurpose test piece for positioning. Further, the cutter head is disposed to face the mounting surface, and is pressed against the mounting surface to cut a desired test piece from an injection molded test piece (multipurpose test piece) mounted on the mounting surface. It is comprised including.

[0007] More specifically, the test piece cutting cutter device according to the present invention has a fixed base capable of mounting and holding a test piece mounting table at a cutting position, and is vertically movably attached to the fixed base. A moving head, and driving means for moving the moving head up and down with respect to the fixed base, wherein the cutter head is attached to the moving head so as to vertically face the test piece mounting table attached to the cutting position, and the driving means Injection molded test piece (multipurpose test piece) with the cutting head of the cutter head mounted on the mounting surface by moving the moving head
And cut off the desired test piece.
At this time, it is preferable that the test piece mounting table is attached to the fixed base so as to be movable horizontally, and is configured to be able to be pulled out of the cutting position and moved horizontally to a mounting / removing position where the upper part is opened.

As described above, according to the present invention, first, the sprue and the runner can be positioned by using the injection molded test piece in which a plurality of multipurpose test pieces are integrally connected via the runner extending from the sprue. Since a plurality of multipurpose test specimens can be collectively positioned using the apparatus, the configuration of the positioning device can be simplified. further,
The cutter head can cut a plurality of rectangular test pieces or the like by cutting the injection-molded test pieces positioned as described above at one time, so that efficient cutting can be performed.

Further, the apparatus of the present invention is composed of a test table mounting table and a cutter head, or a combination of a fixed base, a moving head and a driving means. Because it is possible to reduce the size, for example, a cutter device according to the present invention is provided near an injection molding machine that creates an injection molded test piece, and the desired test piece is cut immediately from the injection molded test piece. can do. In this way, the desired test piece can be cut in accordance with the injection molding cycle. For example, an efficient operation can be performed by, for example, performing a cutting operation using a cutter device during the waiting time for injection molding. be able to.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The cutter device for cutting a test piece according to the present invention basically includes, as shown in FIG.
Test piece mounting table 10 for positioning and mounting injection molded test piece 1
And a cutter head 20 for cutting a plurality of desired test pieces from the injection molded test piece 1 mounted on the test piece mounting table 10.
It is composed of A more specific cutter apparatus for cutting a test piece according to the present invention has an overall configuration as shown in FIGS. 1 to 3, and includes a fixed base 30 on which the test piece mounting table 10 is attached and held, and a fixed base 30. The moving head 40 is provided so as to be movable up and down, and a lever mechanism 50 is used as driving means for moving the moving head 40 up and down.

First, the injection molded test piece 1 will be described with reference to FIG. The injection-molded test piece 1 has a shape as it is produced by injection molding of a resin (plastic), and has a cylindrical sprue 2 extending up and down corresponding to a resin injection path, and a horizontal left and right direction from the upper end of the sprue 2 , A pair of second runners 3b extending back and forth from the left and right ends of the first runner 3a, and a pair of multi-purpose test pieces 5 connected and extended from each second runner 3b. You. A constriction 6 is formed at a connection portion between the second runner 3b and the multipurpose test piece 5, and the constriction 6 is bent so that the multipurpose test piece 5 can be easily separated.

Each of the multipurpose test strips 5 has a wide grip portion 5b at both ends and a parallel portion 5a having a side edge extending in parallel with a fixed width narrower than the grip portion 5b at a center portion, so-called dumbbell-shaped. Is formed. This multipurpose test piece 5
Is used as it is for a tensile test or the like. At this time, the grip portion 5b is gripped and a tensile force is applied to measure the tensile strength at the parallel portion 5a. On the other hand, the bending test, the impact test, and the like are performed by cutting the multipurpose test piece 5 along the dashed line A in the drawing to create a rectangular test piece (desired test piece) including the parallel portion 5a.

The cutter apparatus of the present invention is an apparatus for cutting a multipurpose test piece 5 along a dashed line A to form a rectangular test piece while maintaining the state of the injection molded test piece 1 shown in FIG. Therefore, as shown in detail in FIG. 7, the test piece mounting table 10 on which the injection molded test piece 1 is positioned and mounted opposes the base body 11 having the flat mounting surface 12 and the mounting surface 12. A positioning hole 13 is formed in the center of the mounting surface 12. The sprue 2 of the injection molded test piece 1 is fitted into the positioning hole 13, and the runners 3 a, 3 b
The two multi-purpose test pieces 5 connected via the can be mounted on the mounting surface 1. Further, the outer side edge of the gripping portion 5b of the multipurpose test piece 5 thus placed abuts on the side edge guide surface 14a of the positioning guide 14, and the injection molded test piece 1 is positioned on the test piece mounting table 10. It is placed and held (see FIG. 2). A handle 15 is provided on a side surface of the base body 11.

The cutter head 20 is shown in detail in FIG. 5, and has a rectangular plate-shaped head body 21 and a mounting portion 2 formed at a predetermined width on the lower surface side of the head body 21.
1a, two pairs of cutting blades 22 sandwiched between pressing plates 23 and fastened by bolts 24, and a chuck head 25 protruding from the upper surface of the head body 21.
It is composed of Each pair of cutting blades 22 is attached with a positional interval such that the multipurpose test piece 5 in the state shown in FIG.

For this reason, the injection molded test piece 1 is positioned and mounted on the test piece mounting table 10 as shown by the arrow B in FIG. 4 (see the state shown by the two-dot chain line in FIG. 2). As shown by C, when the cutter head 20 is pressed against the mounting surface 12 such that the respective cutting blades 22 are located at the dashed line A, a rectangular test piece is obtained from each multipurpose test piece 5 of the injection molded test piece 1. It can be cut and created in a lump.

A cutter device having a mechanism for performing such cutting is the device shown in FIGS. 1 to 3, and this device will be described below. The fixed base 30 constituting this apparatus has a base 31 and a support arm 32 extending in a U-shape on the base 31, and extends forward and backward on the base 31. A slide board 33 having a pair of rails 33a is attached. On the other hand, the test piece mounting table 10
The slider 16 is provided on the lower surface of the base body 11 with the rail 33.
The slider 16 is slidably mounted on the rail 33a, and the test piece mounting table 10 is mounted on the base 31.

For this reason, the test piece mounting table 10 is
a, the front side surface of the base body 11 abuts against the front side stopper 34a (see FIG. 1).
), And the rear side surface of the base body 11 is
4c is horizontally slid and moved between the attachment / detachment position abutting on 4c. This horizontal sliding movement is performed by an operator holding the handle 15 of the test piece mounting table 10. Note that a position adjusting screw 34b is screwed into the front stopper 34a, and fine adjustment of the cutting position can be performed by the position adjusting screw 34b.

A vertically extending guide hole 32a is formed in the support arm 32, and a cylindrical head body 41 constituting the moving head 40 is inserted into the guide hole 32a so as to be vertically movable. A chuck (not shown) is provided at the lower end of the head main body 41, and the chuck head 25 is gripped by the chuck, and the cutter head 20 is attached to the lower end of the head main body 41. The cutter head 20 attached in this way vertically faces the test piece mounting table 10 located at the cutting position.

A lever mechanism 50 moves the movable head 40, which can be moved up and down, up and down. The lever mechanism 50 includes a first link 51 and a lever 5.
2, a second link 53, and an operation lever 52. The lower end of the first link 51 has the support arm 32.
Are connected via a pin 51a to the connecting portion 32b of
The upper end is pivotally connected to an intermediate portion of the lever 52 via a pin 51b. The rear end 52a of the lever 52 is pivotally connected to the upper end 42 of the head main body 41 via a pin 43. The front end 52b of the lever 52 is pivotally connected to the upper end of the second link 53 via a pin 53a. Is tied. The operation lever 52 has a base end portion 54a connected to a rotation shaft 55 attached to the support arm 32 and extends therethrough, and has a grip portion 54a at a front end portion. A cam member 56 is attached to the rotating shaft 55, and the cam member 56 and the lower end of the third link 53 are pivotally connected via a pin 53b at a position eccentric from the center of the rotating shaft 55.

In the lever mechanism 50 having such a configuration, when the grip lever 54a is grasped by hand and the operation lever 54 is rotated as shown by an arrow D, the cam member 56 is rotated to move through the third link 53. Front end 5 of lever lever 52
2b is moved upward, and the rear end 52a of the lever 52 is moved downward. As a result, the head main body 41 pivotally connected to the rear end 52a of the lever 52 is moved downward, and the cutter head 20 attached to the lower end of the head main body 41 is placed on the test specimen mounting table 10 which faces the lower side. It is pressed against the placing surface 12. For this reason, two rectangular test pieces are simultaneously cut from the multipurpose test piece 5 of the injection molded test piece 1 positioned and mounted on the mounting surface 12. At this time, due to the link ratio of the lever mechanism 50, the operating force of the operating lever 54 is boosted and transmitted to the head main body 41, and the cutter head 20 is pressed against the mounting surface 12 with a large force. Can easily cut a rectangular test piece.

When performing such a cutting operation, first, the user grips the handle 15 of the test piece mounting table 10, pulls it out to the mounting / removing position, and positions the injection molded test piece 1 on the mounting table 10. After the mounting table 10 is pushed into the cutting position, the operating lever 54 is operated to cut the injection molded test piece 1 at the position of the dashed-dotted line A shown in FIGS. . After the operation lever 54 is returned to its original position,
0 is pulled out to the mounting / removing position, and the cut rectangular test piece and the remaining portion of the injection molded test piece are taken out.

The cutter device is further provided with a stopper device 60 for preventing the operation of the operation lever 54 for safety purposes. The stopper device 60 is mounted on the support arm 32 in a lateral direction (direction E shown in FIGS. 2 and 3).
The slide member 61 includes a slide member 61 movably attached to the slide member 61, a stopper member 62 attached to the tip of the slide member 61, and a wing nut 63 for fixing the slide member 61. When not using the operation lever 54,
Loosen the wing nut 63 and slide the slide member 61 in the direction of arrow E to move the stopper member 62 to the operation lever 54.
Located below. As a result, even if the operation lever 54 is rotated in the direction of arrow D, the operation lever 54 contacts the stopper member 62 and cannot be operated, so that safety can be ensured.

[0023]

As described above, according to the present invention,
An injection-molded test piece integrally having a plurality of multipurpose test pieces connected via a runner extending from the sprue is inserted into the positioning hole to receive the sprue, and the side edge of the multipurpose test piece is brought into contact with the positioning guide. Since the cutter head is pressed against the mounting surface of the mounting table to cut out a desired test piece in a state of being mounted on the test piece mounting table,
A plurality of multipurpose test pieces connected via a sprue and a runner can be collectively positioned by using an injection molded test piece as it is. For this reason, the configuration of the positioning device can be simplified, and a plurality of multi-purpose test pieces can be cut at a time to form a plurality of rectangular test pieces by one cutting.

Further, according to the cutter apparatus for cutting a test piece according to the present invention, the test piece mounting table is mounted and held at the cutting position by the fixed base, and the moving head having the cutter head mounted at the lower end is moved by the driving means. The cutting blade of the cutter head is pressed against the multi-purpose test piece placed on the mounting surface to cut out the desired test piece. Can be created. It is preferable that the test piece mounting table is configured to be horizontally movable between the cutting position and the mounting / removing position, thereby positioning the injection molded test piece and taking out the cut test piece. And can be done easily.

That is, according to the present invention, first, the sprue and the multi-purpose test piece are positioned by using the injection-molded test piece in which a plurality of multi-purpose test pieces are integrally connected via the runner extending from the sprue. Since a plurality of multipurpose test pieces can be collectively positioned by using the method, the configuration of the positioning device can be simplified. Further, the cutter head can cut a plurality of rectangular test pieces or the like by cutting the injection-molded test pieces positioned as described above at one time, so that efficient cutting is possible.

Further, the apparatus of the present invention has a simple structure and can be easily miniaturized. The cutter apparatus according to the present invention is provided near the injection molding machine, and the desired test piece can be immediately obtained from the injection-molded test piece. Can be cut.
In this way, the desired test piece can be cut in accordance with the injection molding cycle. For example, an efficient operation can be performed by, for example, performing a cutting operation using a cutter device during the waiting time for injection molding. be able to.

[Brief description of the drawings]

FIG. 1 is a front view showing a cutter device for cutting a test piece according to the present invention.

FIG. 2 is a plan view showing the cutter apparatus for cutting test pieces.

FIG. 3 is a side view showing the cutter device for cutting a test piece.

FIG. 4 is a perspective view showing a basic configuration of a cutter for cutting a test piece according to the present invention.

FIG. 5 is a perspective view showing a cutter head constituting the cutter apparatus for cutting a test piece.

FIG. 6 is a perspective view showing an injection molded test piece to be cut by the test piece cutting cutter device.

FIG. 7 is a perspective view showing a test piece mounting table which constitutes the test piece cutting cutter device.

[Explanation of symbols]

 Reference Signs List 1 injection molded test piece 2 sprue 3a, 3b runner 5 multipurpose test piece 10 test piece mounting table 12 mounting surface 13 positioning hole 20 cutter head 22 cutting blade 30 fixed base 40 moving head 50 lever mechanism (drive means)

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 3C021 AA05 AA06 BB01 BB04 GA02 GA04

Claims (3)

[Claims] 1. A method for cutting a plurality of desired test pieces from an injection molded test piece integrally formed with a plurality of multipurpose test pieces formed by injection molding of a resin material and connected via a runner extending from a sprue. A cutter device for cutting a test piece, wherein a positioning hole for receiving the sprue is formed, a mounting surface for receiving the sprue in the positioning hole and mounting the multipurpose test piece, A test piece mounting table, which is formed so as to protrude from the mounting surface, and has a positioning guide for positioning the multipurpose test piece mounted on the mounting surface by abutting a side edge thereof, and disposed opposite to the mounting surface. And a cutter head having a cutting blade for cutting a desired test piece from the multipurpose test piece mounted on the mounting surface by being pressed against the mounting surface. Test strip Use cutter device. 2. A fixed base capable of mounting and holding the test piece mounting table at a cutting position, a movable head mounted on the fixed base so as to be vertically movable, and moving the movable head vertically with respect to the fixed base. A driving unit, wherein the cutter head is mounted on the moving head so as to vertically face the test piece mounting table mounted on the cutting position, and the driving head is moved by the driving unit to move the cutter head. The cutter device according to claim 1, wherein the cutting blade is pressed against a multipurpose test piece mounted on the mounting surface to cut out a desired test piece. 3. The test piece mounting table is mounted on the fixed base so as to be movable horizontally, and is horizontally movable to a mounting / removing position where it is pulled out from the cutting position and the upper part is opened. The cutter device for cutting a test piece according to claim 2.